rma is a built-in function for moving average used in RSI in pine script. What is a similar built-in function in Thinkscript?

[petergluis]

rma is a built-in function for moving average used in RSI in pine script. What is a similar built-in function in Thinkscript?

Syntax

rma (source, length) --> series

Returns

Exponential moving average of x with alpha = 1/y.

 

[petergluis]

I would like to know how to create a built-in function of rma by using following code for Thinkscript.

input length =14;
input price = close;
input averageType = AverageType.EXPONENTIAL;
def NetChangeAverage = MovingAverage(averageType , price - price[1], length);
def TotChangeAverage = MovingVerage (averageType, AbsValue(price - price[1]), length);
def rma = if TotChangeAverage !=0 then NetChangeAverge / TotChangeAvg else 0;

 

[howsdiswork]

this is the thinkScript function for a subroutine: https://tlc.thinkorswim.com/center/reference/thinkScript/Reserved-Words/script

 

[halcyonguy]

I would like to know how to create a built-in function of rma by using following code for Thinkscript.

input length =14;
input price = close;
input averageType = AverageType.EXPONENTIAL;
def NetChangeAverage = MovingAverage(averageType , price - price[1], length);
def TotChangeAverage = MovingVerage (averageType, AbsValue(price - price[1]), length);
def rma = if TotChangeAverage !=0 then NetChangeAverge / TotChangeAvg else 0;

mashume created a sub script for rma() here,
https://usethinkscript.com/threads/...cator-overlay-set-indicator.10742/#post-94733

# study("Rob Hoffman - Overlay Set", shorttitle = "RH - MAs", overlay = true)
script rma {
    input source = CLOSE;
    input length = 14;

    def alpha = 1 / length;
    def ma = alpha * source + (1 - alpha) * ma[1];
    plot rma = ma;
};

 

[pupu]

@halcyonguy Is RMA stands for Running Moving Averages?

or it is the Relative Moving Average described here?
https://usethinkscript.com/threads/relative-moving-average-rma.10644/
https://www.tradingcode.net/tradingview/relative-moving-average/